bdi4jade.examples.planselection.TransportationAgent.java Source code

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Here is the source code for bdi4jade.examples.planselection.TransportationAgent.java

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//----------------------------------------------------------------------------
// Copyright (C) 2013 Ingrid Nunes
// 
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
// 
// To contact the authors:
// http://inf.ufrgs.br/prosoft/bdi4jade/
//
//----------------------------------------------------------------------------

package bdi4jade.examples.planselection;

import java.util.Random;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import bdi4jade.belief.TransientBelief;
import bdi4jade.core.SingleCapabilityAgent;
import bdi4jade.extension.planselection.utilitybased.SoftgoalPreferences;
import bdi4jade.extension.planselection.utilitybased.UtilityBasedCabability;
import bdi4jade.goal.Goal;
import bdi4jade.goal.Softgoal;
import bdi4jade.plan.Plan;

/**
 * @author Ingrid Nunes
 */
public class TransportationAgent extends SingleCapabilityAgent {

    public static class TransportationGoal implements Goal {

        private static final long serialVersionUID = 5008348479798066431L;

    }

    public static final String SATISFACTION = "Satisfaction";

    static final long serialVersionUID = 2712019445290687786L;

    private final Log log;
    private final Random rand;

    public TransportationAgent() {
        super(new UtilityBasedCabability());
        this.log = LogFactory.getLog(this.getClass());
        this.rand = new Random(System.currentTimeMillis());
    }

    protected void init() {
        for (Softgoal softgoal : Softgoals.SOFTGOALS) {
            this.addSoftgoal(softgoal);
        }
        for (Plan plan : Plans.PLANS) {
            getCapability().getPlanLibrary().addPlan(plan);
        }
        getCapability().getBeliefBase().addBelief(new TransientBelief<String, GenericValueFunction<Integer>>(
                SATISFACTION, new GenericValueFunction<Integer>()));
    }

    public void updatePreferences() {
        SoftgoalPreferences preferences = (SoftgoalPreferences) this.getCapability().getBeliefBase()
                .getBelief(SoftgoalPreferences.NAME);

        double total = 0;
        for (Softgoal softgoal : Softgoals.SOFTGOALS) {
            double value = rand.nextDouble();
            total += value;
            preferences.setPreferenceForSoftgoal(softgoal, value);
        }
        for (Softgoal softgoal : Softgoals.SOFTGOALS) {
            double value = preferences.getPreferenceForSoftgoal(softgoal);
            double normValue = value / total;
            preferences.setPreferenceForSoftgoal(softgoal, normValue);
        }
        log.debug("Preferences: " + preferences);
    }

}